Smart Splash™ - Shape Shell Turtles Water play is fun and calming to young children. Turtles (LER 7303) teach shapes. Their removable shells include moon, star, cross, circle, square, rectangle, triangle and oval. Kids match the shell to the shape found on the turtle. Each set is made of mold-resistant plastic and includes a reusable mesh bag. Measures 2.75 in x 3 .75 in.